Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9c4beb87242b34c…

MALICIOUS

PDF

35.5 KB Created: 2021-06-18 17:29:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: a53fc919edd4c462aee3abeadc776ccf SHA-1: 2e3ea3731d9857d32c0456abb86f57a8ac78b83d SHA-256: d9c4beb87242b34c45db9a32c71baadcb7d0dc52bff9224de38e258830093449
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded URLs and a document body that explicitly advertises 'Robux Gratis' and game hacks, indicating a social engineering lure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms that the primary embedded URL leads to known malicious infrastructure. The ML classifier also flagged this PDF with high confidence. No scripts were extracted, but the document's content and the malicious redirector strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.co/app/431946152/mediafire-hack-3.0-robux-gratis-game-hack In PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/how-to-code-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/suicideboys-hack-slash-roblox-id_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/how-to-get-free-stuff-in-roblox-on-phone_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/roblox-sprinting-simulator-how-to-do-a-fast-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/how-to-get-a-free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/hack-para-cbro-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/bird-simulator-roblox-coin-cheat_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/hex-number-gives-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/does-free-giveaway-game-actually-gives-you-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/get-free-robux-robloxcom_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/how-to-get-free-bloxburg-in-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/reel-hack-for-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/roblox-free-exploit-download_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/roblox-hacks-for-robux-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/roblox-how-to-get-a-free-dominus-hat-2021-australia_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/step-3-enjoy-your-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/comment-avoir-le-double-sabre-laser-jedi-temple-roblox-free_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31CD 22304 bytes
SHA-256: a4665f272dc81bd54d0f4770263a55488964c28eb320b16579a86b87d8e3b90c
font_01_sfnt_off0000638c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x638C 19728 bytes
SHA-256: 1515f33458680aaa74e1534e0fa290c6048b17dfa3301e82729acd3b0c5772f0

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